在下列句子中,在时间名词前为什么一定要加 once?可以省略吗?加不加 once 有什么区别?I buy a new car once every five years.
老师,你好,想请问一下:Twice three is six这个句子当中,twice是限定词对吗,那限定词后面可以这样直接加基数词用吗,这样有没有语法问题呢。
老师好!请问 for long和 for a long time在句中可以随便互换使用吗?
请问老师,it is+adj+that 从句,任何形容词都可以吗?都是构成主语从句吗?
The illegal vaccine ring was said to have been in operation since 2011.请问: 句中的 said to have 是否可以改为 said that it has?如果可以,两者有什么区别?
When is a convenient time for me to come?请问这个句子中的副词 when 是什么成分?是主语还是表语?
比如:Please be reminded (that) don't go to the basment.这个句子是否正确?
I drive to the place where i don't know. know是接place的吧?
A circle and within the circle are all the things that you are familiar with.这个句子是否正确?within the circle 是在这充当了主语吗?
...请问这需要死记还是有普遍规律?另外,不及物动词后面可以用不定式作宾语吗?请老师详细讲解一下及物动词和不及物动词用法的一些规律
...也许我能多卖出一倍的书。) 请问老师,原句是不是可以等价于Maybe I would have sold twice as many as copies without that equation. 原句为何少用了第二个as?
请问一下。Early in the morning,having assembled outside the school gate,we headed straight to the destination.为什么要去having,have done不可以表示先集合再出发吗?谢谢了!
...的as well as是不可分割,如果是这样的话,句末的as possible可以单独存在吗?麻烦老师分析一下句子成分,谢谢!
...ay, last night等,是不能和现在完成时态同用的,如我们不可以说 He has left two days ago. 为什么Maugham 在 Christmas Holiday 中又有It's bee n decided long ago that the only liberty worth anything is the liberty to do right 的说法呢?
I cannot tell the twins apart.在句意不变的情况下, 我可以改成 I cannot tell apart the twins 么?